<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <script src=" https://code.angularjs.org/1.6.4/angular.js">

    </script>
</head>

<body>
    <div ng-app="" ng-init="firstName='John'">
        <p>姓名:<span ng-bind="firstName"></span></p>
        <p>名字:<input type="text" ng-model="name"></p>
        <h1>Hello {{ name }}</h1>
        <p>我的第一个表达式:{{ 5+5 }}</p>
    </div>

</body>

</html>